Improved spring-bed bottom



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ROBERT A. GOODYEAR, OF BINGHAMTON, NEW YORK.

Leners Patent No. 91,738, dated ame 22, 1869.

IMPRO'VED. SPRING-BED BOTTOM.

The Schedule referred to in these Letters Patent and making of the same.

To all whom it may concern Be it known that I, ROBERT A. GOODYEAR, ofBinghamton, in the county of Broome, and State of New York, haveinvented and made a new and useful Improvement in Spring-Bed Bottoms;andI do hereby (leclare the following to be a full, clear, and exactdescription of the said invention, reference being had to the annexeddrawing, making part of this specification, wherein- Figure lis a sideelevation, showing a portion of one of the slats of the bed-bottom; and

Figure 2 is a plan representing portions of three of such slats.

Similar letters denote the same parts.

In the manufacture o f spring-bed bottoms, diiiiculty has beenexperienced fromthe weight coming only upon a portion ofthe slats, andcausingthe same to bend unduly or break, and efforts have been made toconstruct slats-that would have a spring througllout their vlength of anearly uniform character, but without success, as' far as known,previous to' my inl vention.

lhe nature of my said invention consists in a spring slat forbed-bottoms, formed of parallel-motion links, connecting the top andbottom slats, in combination with springs that act to keep the slatsapart; the operation being that the slat receives a partial endmotion bytheparallel links, as the springs are compressed, and henee,'tllat thetop slat moves throughout its length, parallel, or nearly so, to thestanding bottom slat. By this const-ruction,'the weight of the person,upon any part of the slat, acts upon all the springs of that slat, inconsequence of the parallel Y movement of the slat, as depressed; hence,the slats can be of thinner material `than heretofore, and each springof less strength, because the weight is distributed by the parallelmovementover a greater extent of surface.

In the drawing, a is the bottom slat; b, the top Slat; cc, theparallel-motion links, hinged at'2 and 3, to'the respective slats a andb and d represents the spring.

These slats, a and b, are to be of any desired length, so as to lielongitudinally or transversely in the bedstead, or compose portions ofsectional slats, more or less in number, set together to form thespring-bed bottom. u l

The slats a are to be sutlciently strong to bearthe weight, or else theyare to rest vupon the usual slats of the bedstead.

The springs (l are to be of any usual character, and should beV attachedto the slats, both at top and bottom.

The links c c are applied at suitable distances apart, along the slats,and are parallel to eaclr other, and keep the slat b parallel to theslat a, as th'e former is depressed by any weight, in order that theaction may be uniform, as aforesaid.

What I claim, and desire to secure by Letters. Pat- The parallel links cc, hinged, at their ends, to the top slat b and bottom slat a, incombination with the spring, or springs, intervening between said slats,as andgfor the purpose set forth.

In Witness whereof, I have hereunto set my signature, this 18th day ofMay, A. D. 1869. l

ROBERT A. GOODYEAR.

-Witnesses:

Guns. H. SMITH, GEO. T. PlNoKNEY.

